Fits Chevrolet Performance 12499231 Piston Ring Set of 8, SBC 604

  
Low-tension rings for ZZ4, LT1, and LT4 small block Chevy engines Bore Size: 4.00 Inch. Set of 8 Chevrolet Performance 12528817 piston rings. Chevrolet Performance 12499231 Piston Ring Set of 8, SBC 604. Low-tension rings for ZZ4, LT1, and LT4 small block Chevy engines. Bore Size: 4.00 Inch. Speedway Motors is America's Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 71 years.